A handy email client for a freelancer?

Question

Freelance

Kind.
Advise a convenient mail client , it is desirable that you can log in to 3 accounts at once, @mail, @gmail + the domain of your site, and it is desirable that a notification would come automatically if someone wrote to the mail (if it is possible at all), because I now use the Mozilla Thunderbird application, and there is only 1 account + you need to press the "check mail" button, but I would like the notification to come by itself and it was possible to connect several accounts.
Thanks in advance.

Answer 1

I use the web version of gmail, very convenient. Chrome has popups on the desktop.
From the rest of the mailboxes, set up a redirect to gmail, prescribe filters and folder layout in the gmail rules.
PS mail on @mail.ru is like bad manners in decent circles

Answer 2

I am now using the Mozilla Thunderbird application, and there is only 1 account + you need to press the "check mail" button, but I would like the notification to come by itself and it was possible to connect several accounts.

No one bothers to make a receipt every x minutes.
No one bothers to set up at least as many accounts there.
I myself have been using Claws Mail for many years. Great client.

Answer 3

mail app in windows 10

Answer 4

gmail.com

Answer 5

gmail and forwarding mail to it
I have 30 mailboxes sent there

Answer 6

For freelancing, the sfletter.com service can be useful - letters and attachments can be sent in a secure format. Useful for tests. But it only works on the web.